I haven't had much time to play with my MacBook Air today (trying to actually get some work done), but I did start it up to discover that my wireless network isn't found if I'm upstairs. My wireless router is in the basement. My iPhone and iMac (when it's on wireless, which is hardly ever) both get a signal on the 2nd floor of my house. It's not a strong signal, but it works. The iPhone goes from one bar to full bars. But the MBA gets nothing. I was planning to buy another router to improve my upstairs wireless performance, but I assumed I would get some kind of signal as other wireless devices do (iPhone, iMac, PSP, Palm, Windows laptop). My router is a Linksys WRT54G running in B/G mixed mode. Has anyone else noticed that the wireless range seems kind of short?